| abstract |
Improved process and device for advanced treatment of double-membrane reclaimed water based on membrane fouling control, the improved process includes "lime coagulation-sand filtration" pretreatment, ozone activated carbon, pH adjustment based on CO 2 , "ultrafiltration-reverse osmosis" dual Membrane method, concentrated water return and advanced treatment unit. The invention adopts the ozone activated carbon process to remove the organic pollutants and microorganisms in the reclaimed water, controls the organic matter and microorganism pollution in the membrane process, and ensures the efficient use of the activated carbon; uses CO2 to adjust the pH value, reduces the scaling potential of inorganic salts, and controls the inorganic pollution. ; Part of the reverse osmosis concentrated water returned, and ozone is used to treat the concentrated water to remove organic pollutants in the concentrated water and improve the water recovery rate. On the basis of the conventional double-membrane advanced water treatment process, the improved process uses ozone to reduce organic matter and CO 2 to adjust the pH value to achieve effective control of membrane fouling, which not only ensures the long-term and stable operation of the double-membrane advanced water treatment process, It can also improve the water recovery rate. |